<style>
    .loader {
        position: absolute;
        top: calc(50% - 32px);
        left: calc(50% - 32px);
        width: 64px;
        height: 64px;
        border-radius: 50%;
        perspective: 800px;
    }

    .inner {
        position: absolute;
        box-sizing: border-box;
        width: 100%;
        height: 100%;
        border-radius: 50%;
    }

    .inner.one {
        left: 0%;
        top: 0%;
        animation: rotate-one 1s linear infinite;
        border-bottom: 3px solid gray;
    }

    .inner.two {
        right: 0%;
        top: 0%;
        animation: rotate-two 1s linear infinite;
        border-right: 3px solid gray;
    }

    .inner.three {
        right: 0%;
        bottom: 0%;
        animation: rotate-three 1s linear infinite;
        border-top: 3px solid gray;
    }

    @keyframes rotate-one {
        0% {
            transform: rotateX(35deg) rotateY(-45deg) rotateZ(0deg);
        }
        100% {
            transform: rotateX(35deg) rotateY(-45deg) rotateZ(360deg);
        }
    }

    @keyframes rotate-two {
        0% {
            transform: rotateX(50deg) rotateY(10deg) rotateZ(0deg);
        }
        100% {
            transform: rotateX(50deg) rotateY(10deg) rotateZ(360deg);
        }
    }

    @keyframes rotate-three {
        0% {
            transform: rotateX(35deg) rotateY(55deg) rotateZ(0deg);
        }
        100% {
            transform: rotateX(35deg) rotateY(55deg) rotateZ(360deg);
        }
    }
</style>

<div class="loader">
    <div class="inner one"></div>
    <div class="inner two"></div>
    <div class="inner three"></div>
</div>